oelint.bbclass: add patch checking

Check that all patches have Signed-off-by and Upstream-Status.

[YOCTO #5427]

(From OE-Core rev: a2b6be10daca733ba4e557bd2d831c60589e9ffd)

Signed-off-by: Chong Lu <Chong.Lu@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/oelint.bbclass

@@ -29,4 +29,39 @@ python do_lint() {
         bb.warn("%s: SECTION is not set" % pkgname)
     elif not section.islower():
         bb.warn("%s: SECTION should only use lower case" % pkgname)
+
+
+    ##############################
+    # Check that all patches have Signed-off-by and Upstream-Status
+    #
+    srcuri = d.getVar("SRC_URI").split()
+    fpaths = (d.getVar('FILESPATH', True) or '').split(':')
+
+    def findPatch(patchname):
+        for dir in fpaths:
+            patchpath = dir + patchname
+            if os.path.exists(patchpath):
+                 return patchpath
+
+    def findKey(path, key):
+        ret = True
+        f = file('%s' % path, mode = 'r')
+        line = f.readline()
+        while line:
+            if line.find(key) != -1:
+                ret = False
+            line = f.readline()
+        f.close()
+        return ret
+
+    length = len("file://")
+    for item in srcuri:
+        if item.startswith("file://"):
+            item = item[length:]
+            if item.endswith(".patch") or item.endswith(".diff"):
+                path = findPatch(item)
+                if findKey(path, "Signed-off-by"):
+                    bb.warn("%s: %s doesn't have Signed-off-by" % (pkgname, item))
+                if findKey(path, "Upstream-Status"):
+                    bb.warn("%s: %s doesn't have Upstream-Status" % (pkgname, item))
 }